This is a complete set. Includes the special appendix for volume 8. #End-of-Life Book Collection Organization Yoshitake Oka was born in Kōjimachi, Tokyo in 1902. His father was Minoru Oka, the vice-president and chairman of the Osaka Mainichi Shimbun, and the director of the Commerce and Industry Bureau of the Ministry of Agriculture and Commerce (concurrently the 3rd and 4th Department Heads of the Provisional Industrial Research Bureau). He entered Tokyo Imperial University after attending the former Tokyo Metropolitan First Junior High School and the Second Department of Humanities at the First High School. He studied under Kiheiji Onozuka in the Faculty of Law. He graduated from the Department of Political Science, Faculty of Law, Tokyo Imperial University in 1926. He considered joining the Ministry of Home Affairs and taking charge of labor and social policies, but he hesitated to become a practical worker, so he was hired as an assistant professor in the Faculty of Law upon graduation, on the recommendation of Onozuka. He shifted to the study of political history because Sadaji Yabe, who was hired at the same time, was appointed as an assistant professor in the political science course, and he studied under Sakuzo Yoshino during his time as an assistant professor. He was appointed as an associate professor in 1928 and a professor from 1939. He succeeded Yoshino's political history course and, in addition to the European political history course that had been established, he began to give lectures on Japanese political history from 1935. He visited Europe for two years from 1936, and his diary at the time was published as "Yoshitake Oka's London Diary." He continued to serve as a professor at the University of Tokyo after the war, and served as the Dean of the Faculty of Law from 1955 to 1957. He retired in 1963 and became a professor emeritus at the University of Tokyo. In addition, he cooperated in the establishment of the Department of Political Science, Faculty of Humanities, Gakushuin University in 1949, and served as a concurrent professor there from 1950 to 1955. He became a member of the Japan Academy in 1972.